Plate locker for printing presses



Oct. 15, 1929. H. A. HElNZ PLATE LOCKER FOR PRINTING PRESSES 5 Sheets-Sheet 1 Filed Feb. 29, 1928 Zhmld A. Heinz Attorngy Oct. 15, 1929. H. A. HEINZ PLATE LOCKER FOR PRINTING PRESSES 6 Sheets-Sheet 2 Filed Feb. 29, 1928 Inventor fl arold 1i. Heir), z

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Oct. 15, 1929. I H. A. HEINZ 1,731,662

' PLATE LOCKER FOR PRINTING PRESSES Filed Feb. 29, 1928 5 Sheet s-Sheet s Inventor Harald fLHeinz Attarngy Oct-15, 1929. H. A. HEl NZ 1,731,662

PLATE LOCKER FOR PRINTING PRE SSES Filed Feb- 29, 1928 5 Sheets-Sheet 4 ln'ventor Oct. 15, 1929. i H. A. HEINZ 1,731,662

PLATE LOCKER FOR PRINTING PRESSES Filed Feb. 29, 1928 5 Sheets-Sheet 5 Inventor frlarold fLfifz/hz y Attarngy Patented Oct. 15, 1929 PATENT OFFICE HAROLD AUGUST I-IEINZ, OF PORTLAND, OREGON LPLATE LOCKER FOR PRINTING PRESSES Application filed February 28, 1928.

cylinder with one or more of the sets of plates in printing position thereon.

A still further object of the invention is to provide a plate locking apparatus of this character which insures speed in clamping and releasing the plate, which prevents accidental displacement of the plate during the rotation of the cylinder, which may be adjusted to accommodate plates of varying sizes, which is adapted for insulation upon printing cylinders of the usual construction which is simple and practical in construction, efficient and reliable in performance, and otherwise well adapted for the purpose for which the same is intended.

Other objects of the invention will become apparent during the course of the following detailed description.

In the drawings;

Figure 1 is a plan View of one of the cylinders equipped with my invention and with the plates removed therefrom.

Figure 2 is a similar view showing a portion of the cylinder in longitudinal section.

Figure 3 is a transverse sectional View. taken substantially along the line 3-3 of Figure 2.

Figure 4 is a perspective View of one of the screw locking pins.

Figure 5 is a similar view of one of the sliding pins forming a connection between Serial No. 257,920.

ghe end thrust plate segments and the cylin- Figure 6 is a similar view of one of the double ended tightening screws.

Figure 7 is a similar view of one of the sliding plate section locking blocks disposed adjacent each side of the plate section.

Figure 8 is a transverse sectional view therethrough taken along the line 88 of Figure 7.

Figure 9 is an end elevational View of a printing cylinder, with my invention in assembled position thereon.

Figure 10 is a perspective View of one of the intermediate sliding plate sections marking blocks, showing the arcuate connecting member for attaching the slide locking block for uniform movement therewith.

Figure 11 is a longitudinal sectional view, taken substantially on the line 1111 of Figure 10.

Figure 12 is an end elevational View of the cylinder, with the end thrust plate segments removed therefrom.

Figure 13 is a perspective View of one of the slidable adjustable blocks for the inner plate section.

Figure 14 is a view in side elevation of one of the end thrust plate segments.

fFigure 15 is a front elevational view there- 0 Figure 16 is a vertical sectional View, taken substantially along the line 16-16 of F igure 15.

Figure 17 is an end elevational view of one of the arcuate locking segments interposed between the adjacent ends of the sets of sections, and

Figure 18 is a side elevational view thereof.

Referring now to the drawings in detail, the invention comprises a printing cylinder 5, of a type usually provided in rotary printing presses, and having a shaft 6 extending longitudinally therethrough to which the cylinder is keyed or otherwise suitably attached for rotatably operating said cylinder. The cylinder is adapted to operate as a support, for a series of printing plate so *tions 7, of conventional construction, each of said sections usually being of a semi-circular formation and arranged in pairs to form a plate extending circumferentially about the roll. The ends of each of said plates are bevelled as shown at 8, one end of the cylinder being provided with an under-cut ring 9, fixedly mounted on the cylinder and adapted to have the bevelled edge of the plate fitted thereagainst to form an abutment for the plate to prevent longitudinal movement thereof in one direction.

Mounted upon the opposite end of the cylinder is a similar set of sections 10, having its edges adjacent the plate section 7 spacedtherefrom by means of a sectional ring 11, extending circun'iferentially about the cylinder, and also having its opposite edges under cut, in a manner for receiving the adjacent bevelled ends of the plate sections 7 and 10.

Upon the inner periphery of each of the ring sections 11 is formed a plurality of spacing blocks 12, seated within longitudinally ex tending channels 13, formed in the surface of the cylinder, each of said blocks having ribs 14, formed on the opposite sides thereof and extending longitudinally and slidably arranged in grooves formed in the opposite walls of the channels 13. At one side of the channel 13 is formed a lateral extension 16, providing a convenient means for removing and placing the blocks 12 in position within said channel.

Within the channel 13 extending under the plate section 7 is arranged an adjusting block 1?, likewise having ribs 18 formed at its opposite side for slidable movement in the groove 15 and also havin its end remote from the blocks 12 formed with a threaded opening 19, for threadedly receiving an adjusting screw 29 disposed longitudially in the groove, with its opposite end threadedly inserted in a recess 21 formed in the end of the channel. The ends of the screws are oppositely threaded and are provided intermediate their ends with an adjustable collar 22 defining the limitati ns of the oppositely threaded portions of the screw and having laterally dis posed recesses 23 formed therein, whereby to permit the insertion of a tool for threadedly within the channel 13 of the cylinder. Each set of the blocks 29 and 30 are arranged to form an intermediate block designated at 29 and side blocks designated at 30.

The intermediate block 12 carried by the ring sections 11 are connected to the bolts 26, with the intermediate block 29, whereas the slide blocks of the ring section 11 are connected in a similar manner with the slide blocks 39. At the end of the intermediate block 29 remote from the recess 28 is arranged an arcuate shaped member 31 having its opposite ends provided with an opening 32, permitting the introduction of a bolt or the like for attaching the ends of said arcuate member to the blocks 30, said blocks having a threaded opening 33 formed therein for receiving the attaching bolt whereby to secure the blocks for movement as a unit.

The belt 26 carries an adjusting collar 34, similar to the collar 22, for threadedly adjusting the bolt in the opening of the block 12, and a j ainb nut 35 is also arranged on the bolt for securing the same in adjusted position "i h respect to said block. As will be obed from an inspection of Figure 2 of the drawing, the recess 28, within which the head 2? of the bolt is seated, is sufficiently large to permit a slight play between the bolt head and its associated block, whereby to provide for a limited longitudinal. movement between the bolt and the block. Each of the blocks 29 and 30 are formed with longitudinally extending ribs 36 at opposite sides thereof, which are seated within the grooves 15 of the respective channels to form a guide for the blocks during the longitudinal sliding move ment thereof.

As more clearly illustrated in Figures 10 and 11 of the drawings, the end of the block 29 remote from its end provided with the recess 28, is formed with a longitudinally extending threaded bore 37, for threadedly receiving one end of a screw 38, having its opposite end 39 formed with reverse threads and threadedly inserted within the threaded bore 40 of an. extension 41, extending laterally from a plate segment 42, disposed at the end of the cylinder 5. The extension 41 is of a cross sectional construction, similar to that of the sliding block, heretofore described, and the longitudinally extending ribs 43 of the extension 41 being also arranged for longitudinal sliding movement Within the groove 15 f the channel. A collar 44 is formed intermediate the ends 38 and 39 of the screw for adjusting the respective ends in the threaded bores 3'7 and 40. Cam nuts 45 are also arranged on the threaded portions of the screw for securing the same in threadedly adjusted position.

The arcuate face of the segment 42 is provided with an inwardly extending recess 46, which includes in its area an opening 47, extending transversely through the segment,

substantially equi-distantly between the side edgesof the segment and adjacent their lower edge. The opposite faces of the segment adwithin which is threadedly arranged a screw 51, having a section of the outer end of its shank reduced as indicated at 52, and disposed within the opening 47, of the segment 42, and having the extreme outer end of the said shank square shaped in cross section, as shown at 58.

Arranged upon the reduced end 52 of the shank of the screw is a collar 54, having a split retaining clamp 55, formed at one end and disposed upon the squared end 53 of said shank and carrying a tightening screw 56,.for drawing the split sections of the clamp together, whereby to secure the collar firmly upon the shank of the screw. The opposite end of the collar is disposed within the recess 46 of the segment 48 and is formed with a lateral extension 57 extending radially from the collar and provided with an opening 58 for receiving a lever of a type as shown loyv the dotted lines in Figure 9 of the drawings and designated by the numeral 59, whereupon, by the operation of said lever, to cause the rotation of the screw 51', in a manner to cause the same to move outwardly from the end of the cylinder, whereby to cause the movement of the segment 42, outwardly from the cylinder and to cause the movement of the sliding blocks 29, 30 and 12, in a similar direction.

As clearly illustrated in Figure of the drawings, the side walls of the recess 46 are inclined at asuliicient angle to permit the movement of the lever 59, to rotate the screw 51 sufficiently to move the segment 42 from the cylinder a sufficient distance to permit the disengagement of the bevelled ends of the plates 7 and 10 so as to unlock the same and permit removal thereof.

The inner edge of the arcuate member 31 is undercut, as indicated at 31, in a manner similar to the ring section 11 and is adapted to form an abutment for the bevelled edge of the plate section 10 and arranged to cooperate with said ring section, upon the movement of its associated sliding block members 29 and 30 to lock and unlock the plate in position upon the cylinder.

The shank of the screw 51 immediately in wardly of its reduced section 52 is formed into a collar having recesses 61 formed in the periphery thereof adapted to receive the end 62 of a pin 63, disposed at the inner end of a recess 64, extending tangentially through the wall of the cylinder. A retaining screw 65 is threadedly carried at the outer end of the recess for retaining a coil spring 66 within the recess in position for engaging a flange 67 formed adjacent the inner end of the pin whereby to yieldably retain the end 62 there of in the recesses of the collar 60. A locking screw 68 is threaded through the wall of the casing in a position for transversely extending acrossthe outer ends of the recesses 64, and against which the screw 65 is arranged to abut for preventing the outward movement of said screw.

As clearly illustrated in Figure 3 of the drawings, a pair of pins 63 are provided forengaging each of the screws 51 at substantially opposite sides to prevent any possibility of movement of the screw after the same has once been moved in position for locking the plates 7 and 10 upon the cylinder.

Referring to Figure 4 of the drawing, it

will be seen that the end 62 of the pin is rounded, so as to permit the rotation of the screw 51 against the tension of the spring 65, without necessitating an entire removal; of the pin from its recess.

Inwardly extending recesses 69 are also arranged in the end of the cylinder adjacent the segment 42,-within which is slidably arranged a pin 70 and having. its outer end; reduced and externally threaded, as shown at 71, for threaded engagement with the segment 42 by means of the openings 49'arranged in the ends thereof. The outer portion of the recess 69 is sufficiently enlarged to permit the; mounting of a coil spring 72 about the pin 70 therein, said spring being adapted tonormally urge the segments 42 outwardly from the end of the cylinder.

In the operation of the apparatus, with the parts assembled in proper relation, as indicated, the plates 7 and 10 are placed in position upon the cylinder and the lever 59 is then moved in a proper direction to cause the inward movement of the screw 51 so as to force r the arcuate member 31 against one end of the plate section 10, which operates to force its opposite end against the sectional ring 11 and which in turn causes the ring to also be forced against the adjacent edge of the plate section 7 and cooperating with the fixedly retained ring 9 for securing the plate in position upon the cylinder.

The pins 63 are then seated in the recesses 61 formed in the collar of the screw 51, as shown inFigure 3 of the drawing, and in this manner the plate sections 7 and 10 are firmly secured in position upon the cylinder.

WVhenever it is desired to remove the plates from the cylinder, the pins 63 are released and the lever 59 moved in a proper direction for movement of the screw outwardly from the end of the cylinder, which it is obvious will cause the movementin a similar direction of the arcuate member 31 for releasing the plate section 10, and a continued releasing movement of such member will take up the play between the bolt head 27 and its associated recess 28 to also cause a sliding movement of the blocks 12 away from the plate section 7 to permit the release and removal of such plates.

It will be apparent from an inspection of Figure 2 of the drawings that the play be tween the bolt head 27 and its associated recess will permit the removal of the plate section 10, without interfering with the plate 7 and from this construction it will be apparent that either set of plate sections 7 or 10 may be secured in position upon the cylinder while the other is removed.

It will also be understood that the bolts 20, 26 and 38 permit of a suitable adjustment between the respective sliding blocks so as to permit the use of plates of varying widths upon the cylinder. The opposite threading at the respective ends of such bolts enables the one end thereof to be suitably placed Without danger of loosening the connection at the opposite end of the bolt.

It is obvious from the foregoin description that various changes in the size, shape and arrangement of parts may be resorted to, without departing from the spirit of the invention or the scope of the appended claims.

Having thus described my invention, what I claim as new is:

1. In a locker for printing plates, a plate supporting cylinder, retaining means for the plate comprising a plurality of plate engaging members slidably carried by the cylinder and arranged in abutting relation with the opposite ends of the plate, means for adjustably connecting said member" for uniform sliding movement, a retaining segment for said members adjustably connected to one of the members, said segment having a recess portion forming a pair of spaced walls, a screw threadedly carried by the cylinder with its outer end inserted through the walls of the segment, a flange formed on the screw abutting one side of said walls, and a screw operating collar arranged on the end of the screw between said walls and cooperating with the flange to move the segment and the plate engaging members into and out of plate engaging position.

2. In a locker for printing plates, a plate supporting cylinder, retaining means for the plate comprising a plurality of plate engaging members slidably carried by the cylinder and arranged in abutting relation with the opposite ends of the plate, means for adjustably connecting said members for uniform sliding movement, a retaining segment for said members adjustably connected to one of the members, said segment having a recess portion forming a pair of spaced walls. a screw threadedly carried by the cylinder with its outer end inserted through the walls of HAROLD AUGUST HEINZ. 

